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Arduino Leonardo Pro Micro ATMega32U4

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The Arduino Leonardo Pro Micro utilizes an ATMega32U4 –Offering even more features than a full-sized Leonardo, but at less than a third of the size.

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When it comes to offering power, functionality and native connectivity in a small form factor, no Arduino Boards do it better than the Arduino Leonardo Pro Micro. Equipped with all of the fancy features of the standard Arduino Leonardo, but at less than a third of the size, this microcontroller board utilizes an ATMega32U4 at 16MHz/5V.

One of the best features of this board is that it has native USB connectivity without the bulky external USB interface, which makes a very large difference in very small, but complex, projects. Furthermore, it has 4 channels of 10-bit ADC, or Analog to Digital Conversion, 12 digital I/O pins, 5 PWM pins, as well as hardware serial connections Rx and Tx – which are unique features compared to other boards with similar form factors.

The Leonardo Pro Micro also comes with a built-in voltage regulator, allowing for it to accept voltages of up to 12V DC. Just be sure to connect the power source to RAW if you are utilizing unregulated power, rather than typically plugging it into VCC from a regulated power source.

Note: When uploading sketches, it’s critical to ensure the voltage is set correctly, as uploading a sketch with the wrong voltage or current parameters can cause serious and difficult-to-fix problems.

Technical Specifications:

  • Microcontroller

– ATmega32U4

  • Operating Voltage

– 5V

  • Input Voltage (Regulated)

– 5V DC/500mA into VCC Pin

  • Input Voltage (Unregulated)

– 6V to 12V DC into RAW Pin

  • Digital I/O Pins

– 12

  • PWM Channels

– 5

  • ADC Pins

– 4 x 10-bit

  • Hardware Serial Connections

– Rx and Tx

  • Clock Speed

– 16MHz

  • Dimensions

– 3.30cm x 1.77cm

  • Weight

– ± 6.5g

 

Typical Applications for the Arduino Leonardo Pro Micro:

With so much functionality in such a small-sized package, the Arduino Leonardo Pro Micro is very often used for DIY Robotics and other projects requiring discrete design with limited space. Since it can be programmed via native USB, it is also very accessible, allowing for it to be installed within tight spaces and then programmed via a small cable. As such, Makers have utilized these boards for the following, as well as many other projects:

  • Building an automated watering system that measures soil moisture levels and waters plants with the help of solar positioning and collected solar energy.
  • Designing a temperature and humidity monitor that turns the air-conditioning or dehumidifying unit on or off and adjusts the temperature according to your preferences.
  • Creating a headband that tracks your head movements and eyes allows you to directly control your computer by simply looking and blinking or winking.

Despite the small size of this Leonardo Pro Micro, it certainly packs a punch in terms of power and functionality. And with so many natively integrated components, it is the ideal microcontroller board for compact, discrete and bite-sized projects.

*Note this is not supplied by Arduino themselves. It is, however, manufactured to the same specifications and quality controlled locally to ensure it functions exactly as expected while saving you money.

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Arduino Leonardo Pro Micro ATMega32U4

Arduino Leonardo Pro Micro ATMega32U4

When it comes to building unique electronics projects, there are few better ways to do it than with Arduino. Founded with the intent to make electronics prototyping accessible to all, regardless of age, culture, sex or any other factors, Arduino is one of the world’s leading designers and manufacturers of open-source hardware and software.


Some of the leading microcontroller boards that Arduino has produced include the classic Arduino UNO, as well as many variations with different specialisations and specifications. Some of the most popular Arduino boards – which we stock of course – are the Arduino Mega, Leonardo, Due, Micro, Nano, Mini, as well as the unique Arduino LilyPad. And with these boards at hand, as well as a Shield or two, you can craft thousands of different projects, with each one being tailored to your specific needs, wants and personal tastes.